A. Rosenberg
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View article: Copolyimides for gradient-index optics
Copolyimides for gradient-index optics Open
Copolymerization offers a promising route to the accurate control of material properties, such as refractive index. For compatible polymers, an ability to produce copolymers with incrementally varying refractive indices is a basic requirem…
View article: Determining the out-of-plane thermal expansion coefficient by analyzing the temperature dependence of thin-film interference fringes
Determining the out-of-plane thermal expansion coefficient by analyzing the temperature dependence of thin-film interference fringes Open
We analyze a new method for determining the out-of-plane coefficient of thermal expansion for thin films of transparent materials. The method is based on the measurement of interference peaks recorded in transmission spectra as a function …
View article: Opto-thermal characteristics of amorphous polyimides for optical applications
Opto-thermal characteristics of amorphous polyimides for optical applications Open
Polymeric components are desirable in optical and photonic applications because of their light weight, high impact resistance, and/or ability to be formed into sophisticated shapes or gradient index (GRIN) optics. However, relatively large…